module Math
module Constants

  # Unitless constants in the MKS system (meters, kg, sec)
  #
  module MKS
    SPEED_OF_LIGHT           = 2.99792458e8      # m / s
    GRAVITATIONAL_CONSTANT   = 6.673e-11  # m^3 / kg s^2
    PLANCKS_CONSTANT_H       = 6.62606876e-34 # kg m^2 / s
    PLANCKS_CONSTANT_HBAR    = 1.05457159642e-34 # kg m^2 / s
    VACUUM_PERMEABILITY      = 1.25663706144e-6 # kg m / A^2 s^2
    ASTRONOMICAL_UNIT        = 1.49597870691e11   # m
    LIGHT_YEAR               = 9.46053620707e15 # m
    PARSEC                   = 3.08567758135e16 # m
    GRAV_ACCEL               = 9.80665e0        # m / s^2
    ELECTRON_VOLT            = 1.602176462e-19  # kg m^2 / s^2
    MASS_ELECTRON            = 9.10938188e-31 # kg
    MASS_MUON                = 1.88353109e-28 # kg
    MASS_PROTON              = 1.67262158e-27 # kg
    MASS_NEUTRON             = 1.67492716e-27 # kg
    RYDBERG                  = 2.17987190389e-18 # kg m^2 / s^2
    BOLTZMANN                = 1.3806503e-23   # kg m^2 / K s^2
    BOHR_MAGNETON            = 9.27400899e-24  # A m^2
    NUCLEAR_MAGNETON         = 5.05078317e-27 # A m^2
    ELECTRON_MAGNETIC_MOMENT = 9.28476362e-24 # A m^2
    PROTON_MAGNETIC_MOMENT   = 1.410606633e-26  # A m^2
    MOLAR_GAS                = 8.314472e0       # kg m^2 / K mol s^2
    STANDARD_GAS_VOLUME      = 2.2710981e-2 # m^3 / mol
    MINUTE                   = 6e1        # s
    HOUR                     = 3.6e3      # s
    DAY                      = 8.64e4     # s
    WEEK                     = 6.048e5    # s
    INCH                     = 2.54e-2    # m
    FOOT                     = 3.048e-1   # m
    YARD                     = 9.144e-1   # m
    MILE                     = 1.609344e3 # m
    NAUTICAL_MILE            = 1.852e3    # m
    FATHOM                   = 1.8288e0   # m
    MIL                      = 2.54e-5    # m
    POINT                    = 3.52777777778e-4 # m
    TEXPOINT                 = 3.51459803515e-4 # m
    MICRON                   = 1e-6    # m
    ANGSTROM                 = 1e-10   # m
    HECTARE                  = 1e4     # m^2
    ACRE                     = 4.04685642241e3 # m^2
    BARN                     = 1e-28   # m^2
    LITER                    = 1e-3    # m^3
    US_GALLON                = 3.78541178402e-3 # m^3
    QUART                    = 9.46352946004e-4 # m^3
    PINT                     = 4.73176473002e-4 # m^3
    CUP                      = 2.36588236501e-4 # m^3
    FLUID_OUNCE              = 2.95735295626e-5 # m^3
    TABLESPOON               = 1.47867647813e-5 # m^3
    TEASPOON                 = 4.92892159375e-6 # m^3
    CANADIAN_GALLON          = 4.54609e-3  # m^3
    UK_GALLON                = 4.546092e-3 # m^3
    MILES_PER_HOUR           = 4.4704e-1   # m / s
    KILOMETERS_PER_HOUR      = 2.77777777778e-1 # m / s
    KNOT                     = 5.14444444444e-1 # m / s
    POUND_MASS               = 4.5359237e-1     # kg
    OUNCE_MASS               = 2.8349523125e-2  # kg
    TON                      = 9.0718474e2      # kg
    METRIC_TON               = 1e3     # kg
    UK_TON                   = 1.0160469088e3 # kg
    TROY_OUNCE               = 3.1103475e-2   # kg
    CARAT                    = 2e-4    # kg
    UNIFIED_ATOMIC_MASS      = 1.66053873e-27 # kg
    ATOMIC_MASS              = 1.66053873e-27 # kg
    GRAM_FORCE               = 9.80665e-3 # kg m / s^2
    POUND_FORCE              = 4.44822161526e0 # kg m / s^2
    KILOPOUND_FORCE          = 4.44822161526e3 # kg m / s^2
    POUNDAL                  = 1.38255e-1 # kg m / s^2
    CALORIE                  = 4.1868e0   # kg m^2 / s^2
    BTU                      = 1.05505585262e3 # kg m^2 / s^2
    THERM                    = 1.05506e8  # kg m^2 / s^2
    HORSEPOWER               = 7.457e2    # kg m^2 / s^3
    BAR                      = 1e5        # kg / m s^2
    STD_ATMOSPHERE           = 1.01325e5  # kg / m s^2
    TORR                     = 1.33322368421e2  # kg / m s^2
    METER_OF_MERCURY         = 1.33322368421e5 # kg / m s^2
    INCH_OF_MERCURY          = 3.38638815789e3  # kg / m s^2
    INCH_OF_WATER            = 2.490889e2 # kg / m s^2
    PSI                      = 6.89475729317e3 # kg / m s^2
    POISE                    = 1e-1    # kg m^-1 s^-1
    STOKES                   = 1e-4    # m^2 / s
    FARADAY                  = 9.6485341472e4  # A s / mol
    ELECTRON_CHARGE          = 1.602176462e-19 # A s
    GAUSS                    = 1e-4    # kg / A s^2
    STILB                    = 1e4     # cd / m^2
    LUMEN                    = 1e0     # cd sr
    LUX                      = 1e0     # cd sr / m^2
    PHOT                     = 1e4     # cd sr / m^2
    FOOTCANDLE               = 1.076e1 # cd sr / m^2
    LAMBERT                  = 1e4     # cd sr / m^2
    FOOTLAMBERT              = 1.07639104e1 # cd sr / m^2
    CURIE                    = 3.7e10  # 1 / s
    ROENTGEN                 = 2.58e-4 # A s / kg
    RAD                      = 1e-2    # m^2 / s^2
    SOLAR_MASS               = 1.98892e30 # kg
    BOHR_RADIUS              = 5.291772083e-11 # m
    VACUUM_PERMITTIVITY      = 8.854187817e-12 # A^2 s^4 / kg m^3
    NEWTON                   = 1e0     # kg m / s^2
    DYNE                     = 1e-5    # kg m / s^2
    JOULE                    = 1e0     # kg m^2 / s^2
    ERG                      = 1e-7    # kg m^2 / s^2
  end

end
end

